Dynamo-electric machine.



L. A. TIRRILL.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED NOV. 19, 1904.

Patented Apr. 6, 1909.

2 SHEETS-SHEET 1.

Leona By NORRIS PETERS. INC v LITHO Wasuwctuw D C L. A. TIRRILL.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED NOV.19, 1904.

Patented Apr. 6, 1909.

2 SHEETS-SHEET 2.

CIT

WWNESSE INVENTORI UNITED STATES PATENT OFFICE.

LEONARD A. TIRRILL, -OF LYNN, MASSACHUSETTS, ASSIGNOR TO GENERALELECTRIC COMPANY, CORPORATION OF NEW YORK. r

- DYNAMO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented April 6, 1 909.

Application filed November 19, 1904. Serial No. 233,466.

To all whom it may concern." 7 Be it known that I, LEONARD A. TIRRILL, acitizen of the United States, residing at Lynn, county of Essex, Stateof Massachw 5 setts, have invented certain new and useful Improvementsin Dynamo-Electric Machines,

of which the following is a specification.

At'the present time there is a demand for electric automobile motorsjwhich, while of the same general style and of the same rating, aresupported from the carriages upon which they are mounted indifierentmanners.

Heret'ofore each different method of support employed has ordinarilynecessitated a special type of form of motor frame.

One of "the objects of my present invention is the construction andarrangement of a -motor in which the largest possible number of standardparts can be employed, while at the same time the peculiarities of framecon- In carrying out my invention I secure auxiliary heads to the'endsof the annular field ring. The auxiliary heads employed are providedwith arms or lugs, or otherwise shaped to adapt them to be secured tothe supporting means: The auxiliary heads have secured to them heads orend members of'the inotorf are mounted.

With this construction the only special parts ordinarily needed in orderto supply a motor adapted to be supported in any particular manner arethe auxiliary headiplates. All the other parts of the motor can bestand- I ard parts:

' My invention also comprises certain novel features of construction andarrangement.

' The 'various features of novelty which characterize my invention arepointed out with particularity in the claims annexed. to andforming apart of this specification. a better understandin .of' my invention,however, reference may e had to the accomanying drawings and descriptionin which .I iiave illustrate several motors equipped with my invention.

Of the drawings, Figure 1 is an elevation with parts broken away andin'section showing one form of electric automoblle motor equip ed with.my invention; Fig 2 1s 2.

art a l end view of the motor shown n Fig 1 Fig. 3 is an endelevationand Fig. 4 a side struction necessary for the different methods of motorsupport employed can be obtained.

in which the bearings for the armature shaft- For mounted bearingsleeves 19.

elevation of another form of automobile motor; Fig. 5 is an endelevation and Fig. 6 a side elevation of a third form of automobilemotor; and Fig. 7 is an end elevation and Fig. 8 a side elevationshowing still another form of motor equi ped with my invention.

Referring particu arly to Figs. 1 and 2 of the drawings, 1 representsthe annular field ring of a four-pole automobile motor. To the interiorof the ring 1 are secured four pole pieces 2 surrounded by suitablewindings 3. i

The armature 4 of the motor and commutator'5 are secured to a sleeve'orquill 6 keyed to the armature shaft 7. The armature shaft 7 which isadapted to carry at its end 8 any suitable power-transmitting device,such as a gear, can be reversibly inserted in the uill 6 so that thepower-transmitting end of t e shaft may be located at either side of thearmature.

Against the ends of the field ring 1, which are machined for thepurpose, are secured auxiliary or intermediate head members9 and 10. Themember 9, which is shaped to inclose the commutator 5 and brush-holdersof the motor, :is', provided with an interior radially-extending flange11. Bolts 12 ing through this flange and ta 'ped into the end of thefield ring 1 secure t he member 9 to the field ring 1. Bolts 13 passingthrough the head member-10 and tapped into the end of the field: ring 1secure the member 10 in place.

Rabbeted circular openings are formed centrally in the heads or endmembers 9 and 10. Circular end members 15 substantially identical inconstruction fit in these openings being secured therein by clampinbolts 16 and plates 17. As is ,clearly shown the plates 17 bear againstthe outer surfaces of the end members 15 which are thus angularlyadjustable with reference to the intermediate or auxiliary head membersto which they are secured. The end members 15 are provided with suitableboxes .18 in which are The armature shaft 7 of. the motor is journaledin the bearsleeves 19.

n the construction shown in Figs. 1 and 2 each of the head members 9 and10 is shown as provided with an integral lateral projection or arm 25.Bearings 26 carried at the outer ends of the arms 25,;which extend atone side of the motor proper are adapted to encircle a suitable supportsuch as the axle of the-aw tomobile upon which the motor is mounted. Inthis construction perforated lugs 27 carried bythe field ring 1 formmeans through which the motor is supported from the other side. Asordinarily mounted, the lugs 27 and arms 25 are located in the samehorizontal plane. It will be readily understood that when this is thecase the heads or end members are given a quarter turn from the positionshown so that the waste plugs 28 are directly below the armature shaft 7In automobile construction a motor sus pension in which the motor issuspended by means oflugs, such as the lugs 27, and by projections suchas arms 25 journaled on one of the axles of the automobile is .verycoinmonly employed. 4

With motors such as shown in Figs. 1 and 2, the provision of motorsprovided with arms 25 of different lengths, shapes or dimensions, tomeet the demand of different makers and for different styles, is verysimple, necessitating only the making of a pair of intermediateheadmembers 9 and 10 for each style. All the other parts of the motor may beselected from standard parts in stock.

My method of motor construction can also be employed very advantageouslyin connection with other modes of suspension. For instance, in the formshown in Figs. 3 and 4, the upper side of each auxiliary or intermediatehead member is provided'with a pair of apertured lugs 31 and 32, and themotor sus ension means engages these lugs.

11 the form shown in Figs. 5 and 6, the motor-supporting mechanism issecured to the ends of a pair ofdiametricallywpposed lugs 33 and 34formed on each of the membars 9 and 10.

In the form shown in Figs. 7 and 8, the motor is cradled in straps orsupporting members 35 and 36 which are bolted to the intermediate headmembers as shown in 37 and 38.

With all the various forms of motors shown and illustrated the onlyspecial parts reuired are the intermediatehead members, tough preferablywith the form shown in Figs. 3 to 7 the lugs 27 shown in Figs. 1 and 2are left off. This, however, is a very simple matter.

As is Well known to all those skilled inthe' art the annular field ring1 may be cast with or without lugs from the same pattern.

As before stated, the bearing members 15 are substantially identical inconstruction.

Preferably, however, the bearing memberadjacent the ower-transmittingend of the armature sha t is provided with a somewhat larger bearinsurface proper than the other bearing mem er. When it is desired to havethe power-transmitting end of the armature shaft at the opposite side ofthe armature ing with its power 'transi from that shown in Fig. 1 thearmature .shaft is reversed with respect to the quill 6 and the bearingmembers are interchanged.

It will be obvious to all those skilled in the art that my inventionmaybe employed with many different means of suspension from those shown,and that many variations may be made in the formainl application of myinvention without departing from its spirit; and I do not intend theclaims herein made to be limited to the construction shown more than ismade necessary bythe state of the art.

hat I claim as new and desire to secure by Letters Patent of the UnitedStates, is,

1. In combination, an electric motor, comprising a rigid,self-sustaining field ring, intermediate head members secured to theends of the field ring, heads secured to the intermediate members, aninternal ro tating member formed with an axial opening to receive ashaft, a shaft adapted to be reversibly secured in said opening with.its power transmitting end at either side of the rotating member,bearings for said armature shaft carried by the heads, and supportingdevices engaging the intermediate members, whereby the motor may be madeof standard parts with the exception ofthe intermediate members.

2. In -an-electric motor, a rigid self-sustaining field ring, anintermediate head member secured to one end of said field ring, a headsecured to the intermediate member, an internal rotating member formedwith an axial o ening to receive a shaft, a shaft adapt-e to bereversibly secured in said openitting end at either side of the rotatingmember, a bearing for said armature shaft carried by said head, and asupporting device for the motor engaging the intermediate member,whereby the motor may be made of standard parts with the exception ofthe intermediate member.

3. In combination, an electric motor, comprising an external stationarymember an internal rotating member formed with an axial opening toreceive a shaft, a shaft adapted to bereversibly secured in said openingwithits power-transmitting end ateither side of the rotating member,intermediate members secured to the ends of the stationar member, andbearing members, in which the shaft is journaled adapted to' beinterchangeably secured in said intermediate .men bers.

quill or sleeve, an armature and a commutator carried thereby, a shaftadapted to be reversibly inserted in said quill with its powertransmitting end at either side of the armature, and bearings for saidshaft adapted; to be interchangeably secured in said heads or members.

5. In combination, an electric motor, comprising an external stationarymember; an internal rotating member formed with an axial oFening) toreceive a shaft, a shaft adapte to e reversibly secured in said openingwith its power-transmitting end at either side of the rotating member,intermediatemembers secured to the ends of the stationary member,bearing members in which the shaft is journaled adapted to be inter- 10changeably secured in said intermediate members, and supporting devicesengaging the intermediate members.

In Witness whereof, I have hereunto set my hand this sixteenth day ofNovember, 1904.

LEONARD A. TIRRILL Witnesses:

JOHN A. McMANUs, Jr., DUGALD MoK. McKILLoP.

